
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>列表排序</title>
    <script src="../commonjs/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入姓名" v-model="keyWord">
        <ul>
            <li v-for="person in filterPersons" :key="person.id">
                {{person.name}}-{{person.age}}--{{person.sex}}
            </li>
        </ul>
        <button @click="sortType = 0">原顺序</button>
        <button @click="sortType = 1">年龄降序</button>
        <button @click="sortType = 2">年龄升序</button>
    </div>
    <script>
        Vue.config.productionTip = false;//关闭开发提示
        new Vue({
            el:'#root',
            data:{
                persons:[
                    {id:'001',name:'周冬雨',age:30,sex:"女"},
                    {id:'002',name:'马冬梅',age:31,sex:"女"},
                    {id:'003',name:'周杰伦',age:19,sex:"男"},
                    {id:'004',name:'王卓伦',age:18,sex:"男"},
                ],
                keyWord:'',
                sortType:0  //排序顺序：0.原顺序  1.年龄降序  2.年龄升序
            },
            methods:{
            },
            //computed实现数据过滤
            computed:{
                filterPersons(){
                    const arr = this.persons.filter((person)=>{
                        return person.name.indexOf(this.keyWord) !== -1
                    })
                    if (this.sortType){//this.sortType初始值为0，默认返回false，不进入次循环，也就不会发生排序操作
                        arr.sort((p1,p2)=>{
                            return this.sortType===1 ? p2.age - p1.age : p1.age - p2.age
                        })
                    }
                    return arr
                }
            }
        })
    </script>
</body>
</html>